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Antenna calibration method and device

A technology for antenna calibration and signal calibration, which is applied to antennas, antenna radiation patterns, diversity/multi-antenna systems, etc., can solve the problems of not considering the amplitude and phase difference of the analog link of the transceiver channel, high cost, and high calibration cost

Active Publication Date: 2021-03-12
WUHAN HONGXIN TELECOMM TECH CO LTD +1
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Problems solved by technology

[0004] Existing functions such as calibration and beamforming for large-scale active antenna array systems can only be performed in closed anechoic chambers, which is very expensive and expensive to calibrate, and is generally only applicable to laboratories in the R&D process Testing, cannot be applied to the manufacturing environment of product production
Moreover, the existing over-the-air technology (OTA) calibration test scheme is generally a single-frequency point calibration test, which has low test efficiency, and due to the multiplexing of antenna transmission and reception, OTA calibration generally performs the same compensation for transmission and reception, regardless of The difference in amplitude and phase on the analog link of the transceiver channel will produce certain errors and affect the beamforming performance

Method used

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  • Antenna calibration method and device

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Embodiment Construction

[0080] An N-channel large-scale active antenna array at opposite azimuth angles The receiving model of the broadband signal s(t) at the pitch angle θ can be expressed by the following formula:

[0081]

[0082]

[0083] in, Indicates the inverse Fourier transform; [·] T Represents the matrix transposition operation; K represents the number of single-frequency signal components included in the signal, f k Represents the frequency of the kth single-frequency signal component; s(f k ) represents the frequency spectrum of the kth frequency point signal component; The dimension of n(t) is N×1, which represents the amplitude-phase response of the array to the signal component of the kth frequency point, which is customarily called the array steering vector of the signal; the dimension of n(t) is N×1, representing the noise vector of the array, For the convenience of analysis, it is generally assumed to be Gaussian additive white noise. For the convenience of formula ex...

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Abstract

The application discloses an antenna calibration method and device. In this method, in the process of receiving channel calibration, the receiving calibration signal of the reference beam direction is used to initially update the receiving channel beam weight matrix, that is, the receiving channel is initially calibrated, and then for different beam direction areas, Update the beam weight vectors of multiple beam directions within the range of the corresponding beam direction area, so that the beam weight vectors corresponding to the corresponding areas in the receiving channel beam weight matrix are updated by area, that is, the receiving channel is calibrated by area.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to an antenna calibration method and device. Background technique [0002] Large-scale active antenna array technology is a key enabling technology for 5G communications. Ensuring the consistency of the amplitude and phase of each active channel is a prerequisite for the effective realization of the array beamforming function. [0003] In the 5G communication era, large-scale active antenna array technology has become a key enabling technology. The amplitude and phase calibration and beamforming function verification of existing large-scale active antenna array systems often need to be calibrated in a closed anechoic chamber environment, and a single tone signal (single frequency signal) is generally used to complete the calibration test. In the context of the application of the 5G communication system covering a large bandwidth, large-scale active antenna ar...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/08H04B17/21
CPCH04B7/0897H04B17/21H04B17/12H01Q3/267H04B7/086H04B17/29H04B7/0617H01Q3/00G01R29/10H04B7/0882
Inventor 马静艳王世华段滔伍坚王杰丽
Owner WUHAN HONGXIN TELECOMM TECH CO LTD
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